Java to Kotlin converter: do not generate redundant parenthesis for empty constructor parameters

j2k/tests/testData/ast/nullability/MethodInvokedWithNullArg2.kt

@@ -1,9 +1,9 @@
-class C() {
+class C {
     public fun foo(s: String?) {
     }
 }
 
-class D() {
+class D {
     fun bar(c: C) {
         c.foo(null)
     }